That's true, but passing the test is what matters at first. Afterwards that's when you can start learning more advanced driving. If you try to teach someone "good" driving, it probably won't be what they want when they take the test. They certainly won't like you doing defensive driving during the test (the way people drive in busy cities so they don't get walked all over by other traffic)

I know what you mean with things like parking, when I was learning I was taught how to reverse park using this awkward technique (similar to what you described). Once I passed I deliberately forgot about all that and just used my own co-ordination and spacial awareness (so far I haven't scraped into anything). Sometimes it's better just to go with your instinct rather than try to remember funny little procedures. It's like once you truly start to understand a subject, you forget some of the nonsense they teach you in school.